Surface-contact stud for electric traction.



No. 643,4!4. Patented Feb. I3, |900.

W. KINGSLAND. Y SURFACE CONTACT STUD FCR ELECTRIC TRACTION. (Application led Oct. 4, 1899.) (No Model.)

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UNITED STATES PATENT OFFICE.

IVILLIAM KINGSLAND, OF LONDON, ENGLAND.

SURFACE-CONTACT lSTUD FOR ELECTRIC TRACTION.

SPECIFICATION forming part of Letters Patent No. 643,414, dated February 13, 1900.

Application tiled October 4, 1899. Serial No. 732,456. (No model.) l

To CLZZ whom t may con/cern.-l

Be it known that I, WILLIAM KINGSLAND,

a subject of the Queen of Great Britain, re-` the primary objects'of my invention are to im.

prove the construction of such contact-studs, to render the renewal of the contact-plates or wearing-surfacesiof the plates capable of being easily and simply effected, and to improve the insulation of the said studs or plates.

According to my said invention I formA the aforesaid device in two principal parts, which I will term, respectively, the body and the contact-plate, the body being solidly and permanently fixed to the road-bed of the elec-V tric trainer railway, while the contact-plate is removable, as hereinafter described.

In the accompanying drawings, Figure l is a plan of the .general arrangement of myimproved contact-stud. Fig. 2 is avertical section on the line X Y of Fig. 1 of a contactplate det-ached from the body; and Fig. 3 is a vertical section on the line X Y of Fig. l of a body composed wholly of insulating material, the contact-plate being indicated in positionV in dotted lines. Fig. 4 is a sectional elevation of a complete contact-stud of a slightly-modified construction and in which the contact-plate is separated from anon-insulating body by lneans of an insulating lining or cover to the latter, and Fig. 5 is an external side elevation of the contact-stud shown at Fig. 4.

The body portion A of the stud may be composed of metal or of insulating material or of a combination thereof, according to the amount of insulation required or the conditions under which the device is or may be employed.

shaped formation, so that it may fit tightly v into the hollow body A of the stud, the said contact-plate B having also preferably a projecting flange C, which partly covers-as, for example, at Figs. l and 3-or wholly covers, as at Figs. 4 and 5, the top edgesof the body A of the stud when the plate Bis in position. I form the flange C of the contact-plate so that it can be gripped underneath when required by two or more claws of some suitable lifting apparatus, such as a screw-jack, so that inthis manner a great amount of force can be convenientlyapplied to draw the coni tact-plate B out of the body A of the stud. With this object the bodyA may be recessed at places,`as shown at D, Figs. 1 and 3, in order to permit of the claws being inserted underneath the llange C, and the flange C may likewise be recessed or undercut at C in order to receive such claws or other lifting appliance. Y

The sectional conductor S, Figs. 4 and 5, which has to be electrically connected to the contact-plate B, is brought into the ca vity in the body A of the stud through a suitable opening E, Figs. 3 and 4, and terminates in any suitable form of connector F, Fig. 4.

The contact-plate B 'has connected to it a flexible conductor G of sufficient length to be attached to the connector F before the said contactplate B is put into its place, and space is left in the body of the stud to receive the slack flexible wire G when the contact-plate is in position.

The cavity in the body of the stud may be partially filled with insulating material run in in a liquid state and allowed to set. after the connections have been made in order to efficiently seal the sectional conductor S and protect it from damp.

When the body A of the stud is made wholly or partially of metal or is not made wholly of insulating material, I may provide a lining of insulatingl material I-I, Fig. 4, between the contact-plate B and the body A of the stud, and this insulating material may extend over IOO the top edges of the body A of the stud and down the outside or even around the whole of the outside, according to the amount of insulation it is desired to provide for the stud.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A contact-stud for electric traction,made in two main parts, one the conducting contactplate, and the other forming a body part, to receive the contactplate, one part fitting within the other part wedge fashion, in such manner that the contact-plate can be removed from the body part, when required, substantially as set forth.

2. In a contactstud for electric traction made in two main parts, the combination with a conducting contact-plate, forming one part of the stud, and having downwardly-extending tapered sides; of a body7 forming the second part of the stud, and adapted to be fixed to the road-bed or track, a downwardlytapered cavity in the said body to receive the tapered sides of the contactplate, wedge fashion, a passage into the body for the introduction of the electrical conductor, and means for electrically connecting same to the contact-plate before its introduction into the tapered recess of the body part, substantially as set forth.

3. In a contact-stud for electric traction made in two main parts, the combination with a conducting contact-plate forming one part of the stud and downwardly-inclined sides thereto inclosing a central cavity open at the base; of a body forming the second part of the stud and adapted to be fixed to the roadb'ed or track, a downwardly-tapered recess in the said body to receive and hold the tapered sides of the contact-plate, wedge fashion, a passage into the body for the introduction of the electric conductor into the cavity of the said body, a flexible conductor electrically connected Within the cavity of the contactplate, and means for connecting the electric conductor in the cavity of the body to the iexible conductor in the cavity of the contactplate, before the latter is placed into position, the electrical connections being inclosed in the said internal cavity, when the two parts composing the contact-stud are brought together as set forth.

4. In a contact-stud for electric traction, iliade in two main part-s, the combination with a body adapted to be fixed to the road-bed or track, and forming one part of the stud, and a tapered recess in the said body to receive a tapered conducting contact-plate the latter forming the second part of the stud, the two parts fitting together wedge fashion; of a flange on the upper part of the contact-plate, adapted to fit over or into the upper edges of the body, and recesses in the flange to receive the claws of any known mechanical lifting device, when it is required to separate the two parts of the contact-stud substantially as set forth.

WILLIAM KINGSLAND.

Witnesses:

E. G. BREWER, T. XV. ROGERS. 

